Moving coil system for light-beam galvanometers, light-beam oscillographs and the like

ABSTRACT

A moving-coil system for a light-beam galvanometer, light-beam oscillograph and the like includes a suspending element with a mirror attached to the suspending element. A single rotatable coil defining a window is also provided. The rotating coil is securely mounted on the suspending element in a position inclined with respect thereto so as to cause the suspending element to extend through the window.

United States Patent Kuligow ski MOVING COIL SYSTEM FOR LIGHT-BEAM GALVANOMETERS, LIGHT-BEAM OSCILLOGRAPHS AND THE LIKE Gerd Kuligowski, Berlin, Germany Siemens Aktiengesellschafl, Munich, Germany Filed: Aug. 27, 1973 Appl. No.: 391,584

Inventor:

Assignee:

Foreign Application Priority Data Aug. 29, l972 Germany 2242957 US. Cl 324/154 R Int. Cl G01! 5/02; GOIr 1/00 Field of Search 324/154 R, lSO, 97

References Cited UNITED STATES PATENTS 8/l972 Mercier 324/l54 R May 20, 1975 Primary Examiner-Gerard R. Strecker Attorney, Agent, or Firm-Kenyon & Kenyon Reilly Carr & Chapin [57] ABSTRACT 3 Claims, 1 Drawing Figure MOVING (OIL SYSTEM FOR LIGHT-BEAM GALVANOMETERS, LIGHT-BEAM OSCILLOGRAPHS AND THE LIKE BACKGROUND OF THE INVENTION Moving-coil systems for light-beam oscillographs are known from the publication entitled: Lichtstrahl- Oszillographen 1961, p. 23 by Degenhart, Kuebler Haertel, Soerensen and Troeger in which the rotating coil is suspended between two tensioned wires or tensioned ribbons. The tensioned ribbons serve at the same time for supplying current. A mirror is attached to one of the tensioned ribbons.

Although such moving-coil systems are satisfactory in technical respects, they are difficult to manufacture and are therefore relatively expensive.

For this reason, moving-coil systems have already become known which include a single tensioned wire or a single tensioned ribbon. The mirror is cemented to this ribbon. The moving coil arrangement is also fastened to the ribbon. So that the moving-coil arrangement is symmetrical with respect to the axis of rotation, the known moving-coil systems contain two moving coils which are cemented symmetrically to the tensioned wire or the tensioned ribbon. The configuration of the moving-coil arrangement with two rotating coils is relatively expensive because two individual coils must be wound for one moving-coil system and must then further be connected together electrically.

SUMMARY OF THE INVENTION It is an object of the invention to provide a movingcoil system which is easy to produce and therefore inexpensive.

The moving-coil system of the invention is suitable for use in such devices as a light-beam galvanometer, light-beam oscillograph and the like. The moving-coil system of the invention includes as a feature a suspending element upon which a single rotating coil defining a window is mounted. The rotating coil is securely mounted on the suspending element in a position inclined with respect thereto so as to cause the suspending element to extend through the window.

The suspension element can be, for example, a single tension wire or a single tension ribbon. If required, the suspension element can be a composite tensioning de vice composed of several parts with different crosssections.

In the moving-coil system according to the invention, a single moving coil is therefore sufficient and this has a favorable effect on the manufacturing costs. This rotating coil is advantageously connected to the ten sioned wire or the tensioned ribbon by gluing. However, it is also possible to connect the moving coil mechanically with the tensioned wire or the tensioned ribbon by other means. for instance. by cementing.

Although the invention is illustrated and described herein as a moving coil-system for light-beam galvanometcrs, light-beam oscillographs and the like, it is nevertheless not intended to be limited to the details shown, since various modifications may be made therin within the scope and the range of the claims. The invention, however, together with additional objects and advantages will be best understood from the following description and in connection with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING The drawing is a schematic diagram ofa movable coil assembly according to the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION The moving-coil system includes a suspension element in the form of tension wire 1 on which a mirror 2 is fastened, for example, by means of gluing. The tensioned wire 1 serves at the same time for feeding in the current and is electrically connected at a point 3 with one end 4 ofa moving coil 5 by soldering; the other end 6 of the moving coil is brought out free.

The moving coil 5 is fastened at the tensioned wire 1 at an angle, for instance, by gluing, and, in particular, in such a manner that the tensioned wire 1 passes through the coil window 7. The moving coil is thus connected with the tensioned wire 1 at mutually adjacent end-faces 8 and 9. The connection can be made by gluing cement.

The invention provides a moving-coil system which can be manufactured very inexpensively by using a tensioned wire or a tensioned ribbon as the carrier for the mirror and the single rotating coil.

What is claimed is:

l. A moving coil system for a light-beam galvanorneter, light-beam oscillograph and the like comprising a suspending element defining a longitudinal axis; a mirror securely attached to said suspending element; and, a single undivided rotating coil defining a window, said rotating coil being securely mounted on said suspending element in a position inclined with respect thereto so as to cause said suspending element to extend through said window to conjointly define an acute angle therewith and to cause the composite of said suspending element and said rotating coil to be balanced with respect to said longitudinal axis.

2. The moving coil system of claim 1, said suspending element being a single tension wire.

3. The moving coil system of claim I, said suspending element being a single tension ribbon. 

1. A moving coil system for a light-beam galvanometer, lightbeam oscillograph and the like comprising a suspending element defining a longitudinal axis; a mirror securely attached to said suspending element; and, a single undivided rotating coil defining a window, said rotating coil being securely mounted on said suspending element in a position inclined with respect thereto so as to cause said suspending element to extend through said window to conjointly define an acute angle therewith and to cause the composite of said suspending element and said rotating coil to be balanced with respect to said longitudinal axis.
 2. The moving coil system of claim 1, said suspending element being a single tension wire.
 3. The moving coil system of claim 1, said suspending element being a single tension ribbon. 